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Plastics

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by

Carlos Acosta Miranda

on 7 February 2015

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Transcript of Plastics

FROM THE GREEK WORD
PLASTIKOS
Plastics
Enviroment problems
Which means
"able to be molded"
- Plastic

- Resin

- Polymer
This affects to different aspects...
Ocean
- The meaning of "plastic" and its description


- Types of plastics


- Manufacturing process


- Properties of plastics


- Recycling codes
Land
Animals
Ocean:
Usually plastics take a year to degrade in the oceans, but not entirely, Pieces of polystyrene and nurdles are the most common types of plastic pollution in the oceans, and together with plastic bags
In 2012, an estimated which had about 165 million tons of trash in océanos.
They come from oil, and they are normally organic polymers of high molecular mass. Most of them are synthetic but many are partially.
What are plastics?
L
Land
You can say:
Many
Unit
It's made up of several monomers
When biodegradable plastics decompose methane is released, which is a powerful greenhouse gas that contributes significantly to global warming
Methane
Animals
They are waterproof
Pollution by plastic can poison animals, which may negatively affect the food supply of humans.
Properties
They are malleable
Over 260 species have ingested plastic or have become entangled in plastic elements. It has been estimated that over 400,000 marine mammals die each year because of pollution by plastic in the oceans.
They are resistant to heat
They are good electricity insulators
ID reciclyng codes
They are light
Pet
PE-HD
Resistance to corrosion
PVC
PE-LD
PP
PS
O
Mixed
Rigid and flexible plastic items of various polymer types and colors that are typically found in the household waste bin. It excludes plastic bottles and non-packaging items.
Natural
They are made from plant materials, such as vegetable fats or starches. Because starch is composed of polymers like oil, the base of conventional plastic, it serves as a substitute.
Amber
Natural rubber
They can be...
- Thermo (softening) plastics:
After applying heat they can be molded many times
- Thermoset (ting) plastics:
They can't be heated twice
- Elastomers:
Silicone
Neoprene
Synthetic
Manufacturing process
Compression
Extrusion
Injection
Blowing
Vacuum forming
Calendering
Rotational molding
Dip Molding
plastics can be...
THE END!
Made by Carlos A. and Pablo R.
3 ESO A
In this presentation, we'll see:

Not degrade easily
Natural resource oil, gas, coal
Pollutants in fabrfication process
Full transcript